Bottom roll clearer for textile machines



E E L F. W

BOTTOM ROLL CLEARER FOR TEXTILE MACHINES Filed Dec. 17, 1946 Patented Aug. 10, 1948 BOTTOM ROLL CLEARER FOR TEXTILE MACHINES William F. Lee, Spartanburg, S. C., assignor to William 0. Junker, Spartanburg, S. C.

Application December 17, 1946, serial No. 716,786

3 Claims. (C1. 19V-139) My invention relates to clearing mechanism for textile machines, such as roving or drawing frames, spinning frames and the like, and more especially to a supporting means whereby a clearer is resiliently held in contact with the bottom rolls of the drawing mechanism.

Heretofore, various methods have been employed for holding the clearer against the bottom portion of the bottom rolls so that the lint which accumulated on the periphery thereof would be removed and deposited upon the clearer. In most instances, the clearers have been held in contact with the bottom rolls by a direct pull from the top of the clearer, by a leather thong passed over the rolls and having one end secured to the clearer and the other end to a weight. The objection to this clearer supporting expedient is that the leather thong or cord becomes worn and requires frequent replacement. Furthermore, the arrangement indicated made it diiiicult to adjust the amount of pressure of the clearer against the rolls; and when it would beccme necessary to remove the clearer from association with the rolls, the weights from the leather thongs would have to be taken oli". Some mechanical expedients involving springs have been availed of for maintaining a clearer in contact with drawing machine rolls, but such structures have involved a number of levers and have meant a rather complicated mechanism, aside from taking up considerable space and necessitating care and attention, not to mention incident expense.

It is, therefore, the primary object of the instant invention to provide novel and improved yielding supporting means for the lower roll clearer of a drawing machine which will enable the clearer to be readily separated from the roll when it is desired to remove accumulated lint from the clearer, the nature of the clearer support being such that the springs or other yielding means can be readily replaced while the machine is in operation; and furthermore, to provide for removal of the clearer from the machine ,without removal of the yielding supporting means which maintains the clearer in operative engagement with the rolls.

Additionally, the invention contemplates clearer supporting means for the purpose specified which is very simple in construction, easy to install, involves very little expense and which is substantially fool-proof in operation, aside from requiring but very little space and not cluttering up the machine with movable parts in multiple which are calculated to accumulate lint and get out of order. I

The foregoing and other incidential objects of the invention will be readily understood and appreciated by those skilled in the art upon reference to the accompanying drawing illustrating the now preferred example of the invention.

It is to be understood, however, in this connection, that the invention is susceptible of various other mechanical expressions within theV spirit and scope of the subject matter claimed hereinafter. Y

In the drawings, wherein the same reference characters have been used to designate the same parts throughout the several views- Fig. 1 is a cross-sectional view through a portion of a drawing mechanism of a textile machine showing the invention applied thereto;

Fig. 2 is an elevational view taken at right angles to Fig. 1, and illustrating the application of the invention; and

Fig. 3 is a detailed sectional View illustrating how the individual clearer supporting rods can be lowered slightly and canted to admit of removal of the clearer supporting springs.

Referring to the drawings by reference characters, numeral 5 designates a roll stand support for the roll stand which embodies the standards 6.

Between the standard portions 6 of the roll stand are rotatably mounted, suitably iluted bottom drawing rolls 9, upon which normally rest top rolls 8. Between these pairs of rolls 8, 9, a strand, or sliver, of yarn is adapted to be passed during a drawing operation.

Figure 2 illustrates thevfluted lower drawing rolls 9 as having reductions 9a at their ends and intermediate the lluted portions of the roll. The roll reductions 9a, at the ends of the rolls S provide pntles which :are received in suitable bearing portions in the respective roll stand standard 6, as indicated at 1a.

V The upper rolls 8 are mounted on a shaft 8a which is received in appropriate bearing portions 'la of the roll stand standards 6.

The rolls s, s, or one of each pair is suitablyA driven and customarily a clearer is associated with the top rolls 8 which latter may be leather covered, but such top clearer proposition is not the subject of the instant invention. What the instant invention is concerned with is the clearer I2, for the lower fluted rolls 9, and the yielding support for said clearer I2.

In carrying out the invention, the clearer I2 in its preferred form comprises the elongated bar I2 which preferably has its bottom conveXly curved transversely throughout its length for a purpose to be presently explained. The upper surface of clearer I2 is plane and is provided with transversely concave troughs I3 adjacent each longitudinal edge and running the full length of the bar or clearer I2. The transversely concaved?V troughs I3 receive felt or other fabric liners I3a,

which make friction contact with theY periphery; of the luted roll portions 9 for removing lint" accumulations therefrom,

Referring now to the novel supportingmeans.V for the clearer I2, it will be seenthatsamecom-y prehends a plurality of upstanding rods IUwhicli are spaced from one another in the directiondf the length of the clearer I2. These rods I2 have their upper ends Ib slidably received in transverse holes I I in the intermediate thickened portion of said clearer bar I2. Y

The lower ends of the rods I0 are threaded as at Illa for a substantial -distance and are received in over-sized transverse holes 5a in the roll stand support 5. The advantage of the slightlv over-sized holes 5a for receiving the threaded rod ends Iafwill be appreciated-as the description proceeds.

Surrounding each of the rods I0 is afcompres'-- sion coil spring I 5, whose upper end is adapted to bear against the washer I4 on saidrod I 0 to urge the juxtaposed clearer I 2- upwardly.V The lower end of eachcompression coil spring I5 bears against a similar washer I6 on the associated rod above a nut I8, which is threaded onto the rod. The respective nuts I8-serve as stops to determine the position ofthe upper ends` IIlb off the rods I0- in the slide holes I I` of the clearer I2.

The stop nuts I8, which is;what theyamount, t0, are clampedagainst the upper surface -of the roll stand support 5'by means of nuts I1, which are threaded onto the threaded lower ends. IIIa of the rods I0 to bear against ,a superposed wash-- er I5, to clamp the clearer supporting or guiding rods in rigid verticalposition.v p

It will be apparent from the` foregoing that it is a simple matter to brush out accumulatedv lint in the respective troughs I3 beneath the superjacent uted rollsv 9. To dov this it is only necessary to push the clearer I2 down against the action of springs I5 and then by means of a few strokes of a brush, clear the accumulated lint from the troughs.

In the event that one ofthe springsI5zshould become weakened in service or should break, it can be readily replacedY by anotherispring With'- out stopping the machine. In this connection, it is only necessary to loosen the upperV nut I8 ofthe broken spring-carrying'v rod IIJV so as toA permit said rod. I 0 to dropdown far enoughto clear its upper end Ib from the guide bearing or hole II in the clearer I2, When this ,hasbeen done, the broken or weakened spring. I5t can sim'- ply -be slid off, it being observedfrom Fig. 3 that the rod. I0, when the.- nut I8 hasbeenloosened, can be cantedt'ranslversely ofrthe clearer. I2is`o its end will be adjacent the upwardly: curved concaved bottomofthewlearer: 1 i

rod I8 will be in rigid upright position. 1 making oversized'the rod receiving hole 5a in .the "ro1l^ stand support does not interfere at all with .ft-he normali'rigidity required of the supporting meansfor the clearer I2.

p Furthermore, the structure recited enables the clearer I? to be removed without removal of its By concaving the bottom of the clearer I2, a comparatively slight cant of the rod I D is necessary to permit the broken spring I5 to be removed therefrom. After a new spring I5 has been put in place, the bearing end Ib of the rod is again inserted in the guide hole II of the clearer I2, and the nut I8 tightened down to draw the superposed washer I6 above the bottom nut I'I into rm contact with the under surface of the roll stand support 5.

Employment of the washer I6 above the nut I1 gives good bearing against the under surface of 'the roll stand support 5, so that when the nut I8 is tightened to draw .thesuperposed washer I6 of nut I7 into tight contact with 4the under surface of the roll stand support 5, the associated Thus supporting means, namely the rods IU and springs I5 from the roll stand support 5. When the clearer I2 is to be removed, it Iis only necessary to loosen all ofthe upper nuts I3 ofthe rods Ill.

Anota-her advantage of the novel supporting means for clearer I2 is that it involves but simple rod elements Il, washersand coil springs, all of which are standardfand readily obtainable anywhere.

Furthermore, in order to eli'ectmounting of theclearer on the roll stand support 5it is-only necessary to drill the series of holes 5a for loosely receiving the lower-- threaded ends` Ia-v of the rods I.

Having thus described my invention,- whiat I.

claim is:

1. In-a bottom-roll clearer for drawing: frames havinga roll stand'support, aroll stan-dmarried thereby and pairs of upper and lower: drawing rolls journalled in said'stand; the combination;of a clearer.v comprising; an: elongated bar beneath an-dgrunning the. length of:at:least one andpref erably more of; the, lower rolls, said clearer bar having its under surface` tnansverselyfconvexed; the upper surface ofv said: bar: having laterallyY spaced lineally extendingv grooves co-extensive.

with the bar, said grooves having fabric. linings in contact with superjacent rollszfor removing.'

lintV therefrom, a lineal seriesi ofspaced'upstandingrods` carried by said; roll stand support, the intermediate: portion ofV the clearerbarV having, a

lineal series of. spaced' transverse. bearing holes,.

each. of said: holes slidabl'yreceiving, the upper endY of; one of. the rods, a coil spring carried. by each of the said rods, the lower endsrof the coil. springs operatively supported. by the rollstand support and4 the upperfends yieldably engaging theclearer, and means for adjusting said' rods in the direction; of their lengths whereby to clear the upper ends from the rod receiving holes of,

the clearer.

2. The,combinationsetfforthin; claim 1, and

sai'df rod-adjusting. means comprising anut` on1 each rodi above andibelow the rollstan'd"supportl as the meansvfor effecting linealiadjustment off the rods-andv over-sized rod receiving holsin thezroll stand-through which said rods-extend, whereby the latter after havingv been lowered' fromthe holes in the clearer may be'-moved trans-H versely to the taperedA side of` the clearer bottom toadinit ofremo'val ofthesprings.

3J In af bottom 'roll clearer for drawing Vframes having a roll stand support, a roll stand carried thereby and pairs of upper and lower drawing rolls journalled in said stand; .the combination of a clearer comprising an elongated bar beneath and running the length of at least one of the lower rolls, said olea-rer bar having its under sur- :face transversely convexed, the upper surface of said bar having a lineally extending groove coextensive with the bar, Isaid groove having means in contact with superjacent rolls for removing lint therefrom, a lineal series of spaced upstanding rods Vcarried by said roll ystand support, the intermediate portion of the clearer bar having la lineal series of spaced transverse bearing holes, each of said holes sldably receiving 4the upper end of one of the rods, a coil spring carried by each `oi. the said rods, the lower ends of the coil springs operatively supported by the roll stand 6 support and the upper ends yielda-bly engaging the Iclearer, and means for adjusting said rods in the direction of their lengths whereby to Aclear the upper ends from the rod receiving holes o'f 5 the clearer.

WILLIAM IF. LEE.

REFERENCES CITED The following references are of record in the l0 file of this patent:

UNITED STATES PATENTS 

